There was no main effect of the percentage of slightly older adolescents on behavior problems among males (χ2Δ = 0.10, 1 df, p = 0.76) or females (χ2Δ = 0.59, 1 df, p = 0.44). For males, dropping the moderation effect was not significant (χ2Δ = 7.22, 3 df, p = 0.07). For females, dropping the moderation did cause a significant decrease in goodness of fit (χ2Δ = 105.52, 3 df, p < 0.01). Dropping the moderation of the A pathway (χ2Δ = 11.21, 1 df, p < 0.01) and dropping the moderation of the E pathway (χ2Δ = 101.85, 1 df, p < 0.01) both caused significant decreases in goodness of fit. However, dropping moderation of the C pathway alone was not significant (χ2Δ = 1.60, 1 df, p = 0.21). Figure 2 shows the changing genetic and environmental influences on female behavior problems at varying levels of older adolescent residents, presented such that the reader can evaluate the results from the full model before any moderation effects were dropped as a result of significance testing. As the percentage
